An anal fistula is the medical term for an infected tunnel that develops between the skin and the muscle opening (anus) at the end of the digestive tract.Most anal fistulas are the result of an infection that started in the anal gland. This infection results in an abscess that either drains spontaneously or is surgically drained through the skin near the anus. The fistula then creates a tunnel under the skin and connects with the infected gland. Surgery is usually required to treat the anal fistula. It can start with very severe pain, sometimes called an abscess, starting with the discharge of the anal fistula. Laser treatment is possible in this surgical disease. Surgical treatment is required for a permanent solution.
